Siemens SINAMICS V20 18.5 kW HO – 22 kW LO 3-Phase VFD 6SL3210-5BE31-8UV0

Siemens SINAMICS V20 18.5 kW HO – 22 kW LO 3-Phase VFD 6SL3210-5BE31-8UV0

Product Overview

The Siemens SINAMICS V20 6SL3210-5BE31-8UV0 is a basic variable frequency drive intended to control the speed and operation of compatible three-phase AC motors. This exact model is the unfiltered, frame-size FSE version for three-phase 380–480 V AC supplies. Its two manufacturer-defined duty ratings must be selected according to the driven machinery: 18.5 kW (25 HP) in High Overload (HO) operation and 22 kW (30 HP) in Low Overload (LO) operation. These power figures are alternatives, not additive capacities. The drive is used as part of a properly engineered motor control system with appropriate protection, cabling and parameter settings.

Electrical Ratings

The drive accepts three-phase 380–480 V AC with the Siemens-specified −15%/+10% voltage tolerance and a 47–63 Hz line frequency. It provides a three-phase output with nominal ratings stated at 400 V IEC and 480 V NEC. Under LO duty, rated continuous output current is 45 A at 400 V and 40 A at 480 V; under HO duty, the corresponding currents are 38 A and 34 A. The datasheet also identifies a 45 A reference input/output current notation (IN); this must not be substituted for the HO current. The rated HP and 480 V current values apply within Siemens’ specified 440–480 V voltage range. Output frequency is adjustable from 0 to 550 Hz, but permissible motor and machine speed depends on the connected equipment and mechanical limits.

Control Modes and Performance

The SINAMICS V20 series supports parameterized motor speed control and commonly used V/f-based operating characteristics. For this exact model, Siemens specifies LO overload capacity of 110% of the applicable LO rated output current for 60 seconds within a 300-second cycle. HO operation permits 150% of the applicable HO rated output current for 60 seconds within a 300-second cycle. Select the duty class for actual load profile, starting conditions and overload requirements. Continuous and temporary currents must not be treated as equivalent, and the maximum output frequency does not establish safe operation at that speed for any particular motor.

Communication and Configuration

The model’s published built-in communication protocols are USS and Modbus RTU. These are serial communication protocols; they do not establish an integrated Ethernet or PROFINET connection. Siemens identifies a built-in basic operator panel (BOP) for on-drive parameter entry, indication and commissioning. The manufacturer description specifies four digital inputs, two digital outputs, two analog inputs and one analog output. Their detailed electrical characteristics and configurable functions should be checked in the operating instructions before wiring. Any external controller, adapter, supervisory interface or third-party automation integration requires compatibility verification.

Braking, EMC and Built-in Functions

This UV0 variant is explicitly unfiltered: no integrated EMC filter is claimed. EMC performance of the installed system therefore depends on the power installation, shielding, grounding, cable routing and any appropriate external filtering selected for the site. The exact Siemens datasheet confirms an integrated braking chopper. This hardware allows an appropriately selected external braking resistor to be used for dynamic braking; an external resistor is not confirmed as included with the inverter. Braking energy calculations, thermal protection, resistor duty, wiring and commissioning should follow Siemens’ braking-resistor instructions rather than assuming a universal resistor is suitable.

Installation and Environmental Requirements

Siemens assigns this drive an IP20 / UL open-type protection classification and an FSE enclosure of approximately 245 × 264.5 × 209 mm (W × H × D). It therefore requires an installation environment and enclosure appropriate to the actual exposure to dust, moisture and personnel access. The datasheet lists external fan cooling and wall, through-hole and side-by-side mounting arrangements, subject to the specified clearances and technical conditions. The stated operating temperature extends from −10°C to 60°C, but manufacturer derating instructions apply at temperatures of 40°C and above. The reference installation altitude is 1,000 m. Published maximum motor-cable lengths are 50 m shielded and 100 m unshielded; EMC and practical cabling conditions can impose additional restrictions.

Typical Industrial Applications

Subject to duty, motor and process verification, this drive is a candidate for pump and fan speed regulation, suitable conveyor systems, mixers, air-handling equipment and other industrial speed-control tasks. LO mode can be useful in appropriately sized variable-torque duties, while HO mode provides a greater short-term overload percentage at the lower rated motor power. The application designer must confirm load torque, starting requirements, braking frequency, electrical protection, thermal conditions and integration needs. No energy-saving percentage or application-specific suitability is guaranteed solely by the drive part number.

Exact Variant Verification

The complete identifier 6SL3210-5BE31-8UV0 should be retained in purchasing, engineering and ecommerce records. The related 6SL3210-5BE31-8CV0 is the filtered variant; filtering must not be inferred for this UV0 unit. Although other V20 devices share the series designation, their rating, overload, mechanical and braking configurations can differ. Siemens’ specific datasheet ratings take precedence over general product-family descriptions and distributor abbreviations. An installer should verify current rating and nameplate details before commissioning.

Official Manufacturer Links

Official Manufacturer Product Page: https://mall.industry.siemens.com/mall/en/WW/Catalog/Product/6SL3210-5BE31-8UV0

Official Manufacturer Datasheet / Technical Documentation: https://mall.industry.siemens.com/spice/docuservice/docuservice?configid=14&docu.generationtype=VIEW&docu.inittype=MLFB&docu.language.locale1=en&docu.language.locale2=en&docu.mlfb=6SL3210-5BE31-8UV0&docu.viewid=PDF&language=en&region=HR

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